Question
माना $A =\left[\begin{array}{l}1 \\ 1 \\ 1\end{array}\right]$ तथा $B =\left[\begin{array}{ccc}9^2 & -10^2 & 11^2 \\ 12^2 & 13^2 & -14^2 \\ -15^2 & 16^2 & 17^2\end{array}\right]$ है, तो $A ^{\prime} BA$ का मान है $:$
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